A Pressure Dispersion Type Retrievable Prestressed Anchor Head

Abstract

The invention relates to a pressure dispersion-type recoverable prestressed anchor. The pressure dispersion-type recoverable prestressed anchor comprises a first anchor and at least one second anchor, wherein the first anchor is composed of a first outer anchor body, an inner anchor post, an electric heating device and clamping pieces, and the inner anchor post is made of low-melting-point materials; the at least one second anchor is composed of a second outer anchor body, an inner anchor post, an electric heating device and clamping pieces, the second outer anchor body is provided with a wire hole for stranded steel wires to penetrate as well as a grouting pipe hole for a grouting pipe to penetrate. A first stranded steel wire penetrates the first outer anchor body and the clamping pieces; the first stranded steel wire and a second stranded steel wire penetrate the second outer anchor body, the first stranded steel wire penetrates the wire hole, and the second stranded steel wire penetrates the clamping pieces. The pressure dispersion-type recoverable prestressed anchor can conveniently and easily recover the stranded steel wires; during application, the stranded steel wires are divided into two or more and locked by different anchors, so that tension and pressure can be dispersed onto different anchors, the anchors can be uniformly stressed, and further the stranded steel wires are less prone to loosening, and the anchors can reduce the stress and avoid damage.

Description

technical field [0001] The utility model belongs to the technical field of anchor cable fixing devices for geotechnical engineering, in particular to a pressure dispersion type recoverable prestressed anchor head. Background technique [0002] The current urbanization is accelerating, the development of urban underground space is getting more and more attention, and the foundation pits for super high-rise building construction are getting deeper and deeper. The application of prestressed anchorage technology is increasing, and the amount of steel, steel strands, etc., which are the main stress components, is also increasing, and its use effect is also good. [0003] Prestressed anchorage is a measure to increase the stability of retaining structure or rock and soil mass by anchorage method. The method is to drill a hole through the sliding surface that may slide or has already slipped, fix one end of the steel bar (or steel cable) in the stable rock and soil mass at the bot...

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Problems solved by technology

[0006] The utility model provides a pressure dispersion type recyclable prestressed anchor head. The technical problem to be solved is that the traditional prestressed anchor cable is used for one time, which not only causes waste of materials, but also increases the development of adjacent underground spaces. Obstacles increase the difficulty of construction; and the steel strands are all locked by one anchor head, all the tension and pressure are concentrated on one anchor head, so that the force on the anchor head is concentrated, and the steel strands are prone to loosening and the anchor head is damaged by compression. The problem

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